Cinch Connectivity Solutions 51R Terminal Lug Strip

Part Overview

The Cinch Connectivity Solutions 51R is a 2-position terminal lug strip with single-end terminal lugs and integrated ground position. This component is classified as obsolete, making equivalent substitutes necessary for ongoing applications and new designs. The 51R provides a compact solution for single-row terminal lug applications with a board footprint of 0.375" W x 0.625" H and cadmium-plated steel contacts on an XPC phenolic board.

Substiute Parts

51R

Cinch Connectivity SolutionsIn Stock: 83451R Datasheet

Current PartRFQ

805

Keystone ElectronicsIn Stock: 21432805 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Keystone Electronics 805 qualifies as a functional equivalent to the Cinch 51R based on the following critical parameters:

Matching Electrical and Mechanical Criteria:

• Terminal configuration: 2-position terminal lug strip with single-end terminal lugs and ground position
• Number of rows: Single row
• Mounting hole diameter: 0.140" (4.66mm) — identical to main part
• Terminal type: Terminal Lug, Single End
• Moisture sensitivity: MSL 1 (Unlimited)

Functional Compatibility: The 805 maintains the same terminal lug interface and mounting hole specification, enabling direct mechanical and electrical substitution in applications designed for the 51R. Both components are classified as standard strips with identical position counts and row configurations.

Differences in Secondary Parameters: The 805 features a larger board footprint (0.750" L x 0.375" W x 0.062" H), tin-plated brass contacts, and XP Phenolic board material. These differences do not affect functional substitution when mounting hole alignment and terminal lug compatibility are the primary design constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criterion: Product Status

The Cinch 51R is classified as obsolete, necessitating transition to active alternatives for new procurement and design continuity. The Keystone Electronics 805 is an active product with current manufacturing support and inventory availability.

Compliance Considerations

Both components meet RoHS requirements. The 51R carries RoHS Compliant status, while the 805 meets the more recent ROHS3 Compliant specification. The 805 additionally carries REACH Unaffected status, providing broader regulatory coverage for international applications.

Inventory and Supply Chain

The 51R maintains 758 pieces in stock as new original inventory. The Keystone 805 offers significantly higher availability with 21,400 pieces in stock, supporting both immediate requirements and long-term supply security.

Mechanical and Electrical Compatibility

Identical mounting hole diameter (0.140") and terminal lug configuration enable direct substitution in existing designs. The larger board footprint of the 805 requires verification of available mounting space in the target application.

Frequently Asked Questions (FAQ)

Q: Can the Keystone 805 directly replace the Cinch 51R in existing designs?

A: Yes, provided that the larger board dimensions of the 805 (0.750" L x 0.375" W x 0.062" H) do not conflict with available mounting space. The mounting hole diameter and terminal lug interface are identical, enabling mechanical and electrical compatibility.

Q: What are the key differences between these two components?

A: The primary differences are board material (XPC versus XP Phenolic), contact material (steel versus brass), contact finish (cadmium versus tin), and board dimensions. The 805 features a larger footprint and tin-plated brass contacts, while the 51R uses cadmium-plated steel contacts on a smaller board.

Q: Are both components moisture-sensitive?

A: No. Both components carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity limitations during storage or handling.

Q: Which component should be selected for new designs?

A: The Keystone Electronics 805 is the appropriate choice for new designs due to its active product status, higher inventory availability, and current regulatory compliance (ROHS3 and REACH Unaffected).

Q: Does the contact finish difference affect electrical performance?

A: Both cadmium-plated steel and tin-plated brass contacts provide adequate electrical conductivity for terminal lug strip applications. Contact finish selection depends on specific environmental and corrosion resistance requirements of the target application.